I had one of the other dudes 3d printed stock adapters, it arrived broken. I epoxied it back together and installed it, and the other wing broke off the first time I grabbed the gun by the stock. Not impressed at all. I ended up with the normal stock adapter until the kit arrives. I will be a little more at ease with a 3d printed grip if it has your seal of approval. I don't abuse my gear, but I don't treat it like the hope diamond either..